Very good mouse recommend Positives: - Beautiful design, very good quality materials - Excellent program that allows you to program the buttons for different programs, change the dpi and accuracy, the battery display - Smaller than the other gamer mouse - Battery life (a test longer but I would say about 2-3 months with good batteries), much more than other gaming mouse Negative point: - Lightweight lags pure Bluetooth (especially when used with another Bluetooth device at the same time), but perfect connection to the usb dongle